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new way of using camera for ignition

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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new way of using camera for ignition

Unread postAuthor: hunter1992 » Thu Apr 05, 2007 12:08 am

Here is my way of using a disposible camera for ignition. I wanted a way of easily using just the camera and not haveing to figure out ignition coils or whatever people are doing. With and o ring i can get a perfect seal and i can push the bolt down realy smoothly and consistently get HUGE sparks. Sorry for the blurry picture but I can't get my camera to work right :x Here is a video demonstrating how the ignition works. Image Just wondering what you guys thoughts would be on this setup.

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Unread postAuthor: hi » Thu Apr 05, 2007 12:14 am

that is really cool and looks like it works well, bu it would be nice if you could tell us how exactly it works and what to do.
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Unread postAuthor: hunter1992 » Thu Apr 05, 2007 12:31 am

Sorry about that. Well i don't no anything at all about currents or electricity but i know you cant get a spark using a camera without the wires touching. So i connected one wire to a bolt and screwed it into the chamber the other bolt i put a spring on the bolt and and nut screwed onto the bolt on the inside of the chamber, then connected the other wire to the bolt. So when i press on the bolt with the spring it touches the other bolt making a large spark.
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Unread postAuthor: frankrede » Thu Apr 05, 2007 12:54 am

Thats beautiful!

You should make a how to on making them,
if you want, I would keep it a secret and tease everyone about it.
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Unread postAuthor: Flying_Salt » Thu Apr 05, 2007 1:27 am

frankrede wrote:You should make a how to on making them,
if you want, I would keep it a secret and tease everyone about it.


Then people like me would copy it and blow ourselves up. Sounds like fun!

That's a cool little sparker sytem dealie. It looks like a doughnut...with sparkles!

So how many times did you shock yourself making it?
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Unread postAuthor: mopherman » Thu Apr 05, 2007 8:15 am

wont that shock you hand? or do you have insulation on the skrews?
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Unread postAuthor: lukemc » Thu Apr 05, 2007 8:20 am

i think if you post this and how to make it in the how to section people would really like it
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Unread postAuthor: Scope » Thu Apr 05, 2007 1:36 pm

It wont shock your hands because your hand has more resistance then the metal thus the electricity just wants to go through the metal contacts equalize... you can hold one of the leads and nothin will happen at this voltage... this is only true with DC.
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Unread postAuthor: hunter1992 » Thu Apr 05, 2007 2:05 pm

what he ^ said...
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Unread postAuthor: jimmy101 » Thu Apr 05, 2007 2:30 pm

Hunter1992-
Very clever. Have you actually tried this in a cannon yet?

I wonder how much recoil there will be on the trigger.

Of course, if you do touch both leads... disposable camera flash units have ~7 joules stored in the cap.
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Unread postAuthor: Flying_Salt » Thu Apr 05, 2007 2:38 pm

jimmy101 wrote:.
Of course, if you do touch both leads... disposable camera flash units have ~7 joules stored in the cap.


How many volts is that? My camera flash has 300 volts.
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Unread postAuthor: SpudBlaster15 » Thu Apr 05, 2007 2:47 pm

Joules is a measure of energy - it has no direct relation to the voltage output of the camera.

I am not a huge fan of camera flash igniters. Besides the wait to charge the capacitor, the spark gap must be extremely small. However, I like your system alot. Eliminating the traditional spark gap altogether is bothe unique and creative. Good job.
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Unread postAuthor: frankrede » Thu Apr 05, 2007 8:12 pm

It seems like you can put it on a cannon and it would be easy to fire, no twisting or hard pzeizos to press!
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Unread postAuthor: hunter1992 » Thu Apr 05, 2007 11:04 pm

Yes, I have put the system on a cannon. It seems to work fine but i don't have a propane meter so its hard for me to realy tell how well it works. its a pretty cool to just flip a switch and push a button to shoot the cannon. you can always tell when you get a good spark because it makes a realy loud snap when it sparks.
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Unread postAuthor: hunter1992 » Tue Apr 10, 2007 5:01 pm

So is this somthing people would like me to make a how to? If so i would be happy to make one.
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